651267240 has 64 divisors (see below), whose sum is σ = 2104099200. Its totient is φ = 160311552.

The previous prime is 651267173. The next prime is 651267257. The reversal of 651267240 is 42762156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207180 + ... + 210299.

It is an arithmetic number, because the mean of its divisors is an integer number (32876550).

Almost surely, 2^651267240 is an apocalyptic number.

651267240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

651267240 is an abundant number, since it is smaller than the sum of its proper divisors (1452831960).

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

651267240 is a wasteful number, since it uses less digits than its factorization.

651267240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417506 (or 417502 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 651267240 is about 25519.9380876992. The cubic root of 651267240 is about 866.8016798207.

The spelling of 651267240 in words is "six hundred fifty-one million, two hundred sixty-seven thousand, two hundred forty".