1428477900 has 72 divisors (see below), whose sum is σ = 4160931600. Its totient is φ = 378359040.

The previous prime is 1428477877. The next prime is 1428477901. The reversal of 1428477900 is 97748241.

It is a happy number.

It is a super-2 number, since 2×1428477900² = 4081098221576820000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1428477901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28722 + ... + 60678.

Almost surely, 2^1428477900 is an apocalyptic number.

1428477900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428477900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2080465800).

1428477900 is an abundant number, since it is smaller than the sum of its proper divisors (2732453700).

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

1428477900 is a wasteful number, since it uses less digits than its factorization.

1428477900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32123 (or 32116 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1428477900 is about 37795.2100139687. The cubic root of 1428477900 is about 1126.2233014243.

The spelling of 1428477900 in words is "one billion, four hundred twenty-eight million, four hundred seventy-seven thousand, nine hundred".