1401639456 has 192 divisors, whose sum is σ = 4415717376. Its totient is φ = 380851200.

The previous prime is 1401639433. The next prime is 1401639467. The reversal of 1401639456 is 6549361041.

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, 1270201 + ... + 1271303.

It is an arithmetic number, because the mean of its divisors is an integer number (22998528).

Almost surely, 2^1401639456 is an apocalyptic number.

1401639456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401639456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207858688).

1401639456 is an abundant number, since it is smaller than the sum of its proper divisors (3014077920).

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

1401639456 is a wasteful number, since it uses less digits than its factorization.

1401639456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1401639456 is about 37438.4756099925. The cubic root of 1401639456 is about 1119.1254482366.

The spelling of 1401639456 in words is "one billion, four hundred one million, six hundred thirty-nine thousand, four hundred fifty-six".