1400887656 has 192 divisors, whose sum is σ = 4572676800. Its totient is φ = 396192384.

The previous prime is 1400887643. The next prime is 1400887661. The reversal of 1400887656 is 6567880041.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1131870 + ... + 1133106.

It is an arithmetic number, because the mean of its divisors is an integer number (23816025).

Almost surely, 2^1400887656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400887656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2286338400).

1400887656 is an abundant number, since it is smaller than the sum of its proper divisors (3171789144).

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

1400887656 is a wasteful number, since it uses less digits than its factorization.

1400887656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373 (or 1356 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 1400887656 is about 37428.4337903685. The cubic root of 1400887656 is about 1118.9253233090.

The spelling of 1400887656 in words is "one billion, four hundred million, eight hundred eighty-seven thousand, six hundred fifty-six".