1290623900 has 36 divisors (see below), whose sum is σ = 2812424160. Its totient is φ = 514080000.

The previous prime is 1290623861. The next prime is 1290623903. The reversal of 1290623900 is 93260921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290623903) 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, 3101 + ... + 50900.

Almost surely, 2^1290623900 is an apocalyptic number.

1290623900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290623900 is an abundant number, since it is smaller than the sum of its proper divisors (1521800260).

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

1290623900 is a wasteful number, since it uses less digits than its factorization.

1290623900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54254 (or 54247 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1290623900 is about 35925.2543484385. The cubic root of 1290623900 is about 1088.7627011822.

The spelling of 1290623900 in words is "one billion, two hundred ninety million, six hundred twenty-three thousand, nine hundred".