1521463428 has 18 divisors (see below), whose sum is σ = 3845921534. Its totient is φ = 507154464.

The previous prime is 1521463423. The next prime is 1521463439. The reversal of 1521463428 is 8243641251.

It is a happy number.

1521463428 is a `hidden beast` number, since 1 + 5 + 2 + 14 + 634 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1189422144 + 332041284 = 34488^2 + 18222^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1521463428² = 4629701925483022368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 42262873 = 1521463428 / (1 + 5 + 2 + 1 + 4 + 6 + 3 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 1521463392 and 1521463401.

It is not an unprimeable number, because it can be changed into a prime (1521463423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21131401 + ... + 21131472.

Almost surely, 2^1521463428 is an apocalyptic number.

1521463428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1521463428 is an abundant number, since it is smaller than the sum of its proper divisors (2324458106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1521463428 is a wasteful number, since it uses less digits than its factorization.

1521463428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42262883 (or 42262878 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 1521463428 is about 39005.9409321196. The cubic root of 1521463428 is about 1150.1482929120.

The spelling of 1521463428 in words is "one billion, five hundred twenty-one million, four hundred sixty-three thousand, four hundred twenty-eight".