1240800920 has 32 divisors (see below), whose sum is σ = 2867259600. Its totient is φ = 482905728.

The previous prime is 1240800901. The next prime is 1240800937. The reversal of 1240800920 is 290080421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240800920.

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, 417710 + ... + 420669.

Almost surely, 2^1240800920 is an apocalyptic number.

1240800920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240800920 is an abundant number, since it is smaller than the sum of its proper divisors (1626458680).

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

1240800920 is a wasteful number, since it uses less digits than its factorization.

1240800920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838427 (or 838423 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1240800920 is about 35225.0041873667. The cubic root of 1240800920 is about 1074.5683271330.

The spelling of 1240800920 in words is "one billion, two hundred forty million, eight hundred thousand, nine hundred twenty".