1292440920 has 64 divisors (see below), whose sum is σ = 3880465920. Its totient is φ = 344371584.

The previous prime is 1292440859. The next prime is 1292440957. The reversal of 1292440920 is 290442921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174819 + ... + 182061.

It is an arithmetic number, because the mean of its divisors is an integer number (60632280).

Almost surely, 2^1292440920 is an apocalyptic number.

1292440920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1292440920 is an abundant number, since it is smaller than the sum of its proper divisors (2588025000).

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

1292440920 is a wasteful number, since it uses less digits than its factorization.

1292440920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744 (or 8740 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1292440920 is about 35950.5343492972. The cubic root of 1292440920 is about 1089.2734040385.

The spelling of 1292440920 in words is "one billion, two hundred ninety-two million, four hundred forty thousand, nine hundred twenty".