651398072 has 32 divisors (see below), whose sum is σ = 1319591280. Its totient is φ = 299669760.

The previous prime is 651398039. The next prime is 651398081. The reversal of 651398072 is 270893156.

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, 22547 + ... + 42557.

Almost surely, 2^651398072 is an apocalyptic number.

It is an amenable number.

651398072 is an abundant number, since it is smaller than the sum of its proper divisors (668193208).

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

651398072 is a wasteful number, since it uses less digits than its factorization.

651398072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20343 (or 20339 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 651398072 is about 25522.5012880791. The cubic root of 651398072 is about 866.8597193869.

The spelling of 651398072 in words is "six hundred fifty-one million, three hundred ninety-eight thousand, seventy-two".