651239046 has 12 divisors (see below), whose sum is σ = 1411017972. Its totient is φ = 217079676.

The previous prime is 651239021. The next prime is 651239081. The reversal of 651239046 is 640932156.

It is a happy number.

It is a super-2 number, since 2×651239046² = 848224590069980232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651239046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18089956 + ... + 18089991.

It is an arithmetic number, because the mean of its divisors is an integer number (117584831).

Almost surely, 2^651239046 is an apocalyptic number.

651239046 is an abundant number, since it is smaller than the sum of its proper divisors (759778926).

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

651239046 is a wasteful number, since it uses less digits than its factorization.

651239046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36179955 (or 36179952 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 651239046 is about 25519.3856900984. The cubic root of 651239046 is about 866.7891714075.

The spelling of 651239046 in words is "six hundred fifty-one million, two hundred thirty-nine thousand, forty-six".