1455991900 has 36 divisors (see below), whose sum is σ = 3446732520. Its totient is φ = 529451200.

The previous prime is 1455991879. The next prime is 1455991913. The reversal of 1455991900 is 91995541.

It is a super-2 number, since 2×1455991900² = 4239824825731220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660715 + ... + 662914.

It is an arithmetic number, because the mean of its divisors is an integer number (95742570).

Almost surely, 2^1455991900 is an apocalyptic number.

1455991900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1455991900 is an abundant number, since it is smaller than the sum of its proper divisors (1990740620).

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

1455991900 is a wasteful number, since it uses less digits than its factorization.

1455991900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323654 (or 1323647 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 43.

The square root of 1455991900 is about 38157.4619176905. The cubic root of 1455991900 is about 1133.4081198246.

The spelling of 1455991900 in words is "one billion, four hundred fifty-five million, nine hundred ninety-one thousand, nine hundred".