997392420 has 48 divisors (see below), whose sum is σ = 3103000320. Its totient is φ = 265971168.

The previous prime is 997392379. The next prime is 997392433. The reversal of 997392420 is 24293799.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 922972 + ... + 924051.

It is an arithmetic number, because the mean of its divisors is an integer number (64645840).

Almost surely, 2^997392420 is an apocalyptic number.

997392420 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

997392420 is an abundant number, since it is smaller than the sum of its proper divisors (2105607900).

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

997392420 is a wasteful number, since it uses less digits than its factorization.

997392420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847041 (or 1847033 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 997392420 is about 31581.5202294000. The cubic root of 997392420 is about 999.1300500733.

The spelling of 997392420 in words is "nine hundred ninety-seven million, three hundred ninety-two thousand, four hundred twenty".