1520272400 has 60 divisors (see below), whose sum is σ = 3811279872. Its totient is φ = 581665920.

The previous prime is 1520272393. The next prime is 1520272409. The reversal of 1520272400 is 42720251.

It is a happy number.

It is a super-2 number, since 2×1520272400² = 4622456340403520000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1520272409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73424 + ... + 91823.

Almost surely, 2^1520272400 is an apocalyptic number.

1520272400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520272400 is an abundant number, since it is smaller than the sum of its proper divisors (2291007472).

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

1520272400 is a wasteful number, since it uses less digits than its factorization.

1520272400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165288 (or 165277 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 1520272400 is about 38990.6706790227. The cubic root of 1520272400 is about 1149.8480958778.

Adding to 1520272400 its reverse (42720251), we get a palindrome (1562992651).

The spelling of 1520272400 in words is "one billion, five hundred twenty million, two hundred seventy-two thousand, four hundred".