1520323128 has 32 divisors (see below), whose sum is σ = 4223120400. Its totient is φ = 506774304.

The previous prime is 1520323117. The next prime is 1520323177. The reversal of 1520323128 is 8213230251.

It is a super-2 number, since 2×1520323128² = 4622764827063408768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3519051 + ... + 3519482.

Almost surely, 2^1520323128 is an apocalyptic number.

1520323128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1520323128 is an abundant number, since it is smaller than the sum of its proper divisors (2702797272).

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

1520323128 is a wasteful number, since it uses less digits than its factorization.

1520323128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038548 (or 7038538 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1520323128 is about 38991.3211881824. The cubic root of 1520323128 is about 1149.8608849993.

Adding to 1520323128 its reverse (8213230251), we get a palindrome (9733553379).

The spelling of 1520323128 in words is "one billion, five hundred twenty million, three hundred twenty-three thousand, one hundred twenty-eight".