997429278000 has 160 divisors (see below), whose sum is σ = 3319445256192. Its totient is φ = 257401056000.

The previous prime is 997429277987. The next prime is 997429278017. The reversal of 997429278000 is 872924799.

It is a super-2 number, since 2×997429278000² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2495262 + ... + 2867261.

Almost surely, 2^997429278000 is an apocalyptic number.

It is an amenable number.

997429278000 is an abundant number, since it is smaller than the sum of its proper divisors (2322015978192).

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

997429278000 is a wasteful number, since it uses less digits than its factorization.

997429278000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5362580 (or 5362564 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 997429278000 in words is "nine hundred ninety-seven billion, four hundred twenty-nine million, two hundred seventy-eight thousand".