1401963660 has 48 divisors (see below), whose sum is σ = 4361666400. Its totient is φ = 373856832.

The previous prime is 1401963649. The next prime is 1401963679. The reversal of 1401963660 is 663691041.

1401963660 is a `hidden beast` number, since 1 + 4 + 0 + 19 + 636 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1297575 + ... + 1298654.

It is an arithmetic number, because the mean of its divisors is an integer number (90868050).

Almost surely, 2^1401963660 is an apocalyptic number.

1401963660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401963660 is an abundant number, since it is smaller than the sum of its proper divisors (2959702740).

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

1401963660 is a wasteful number, since it uses less digits than its factorization.

1401963660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596247 (or 2596239 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1401963660 is about 37442.8051833727. The cubic root of 1401963660 is about 1119.2117274326.

The spelling of 1401963660 in words is "one billion, four hundred one million, nine hundred sixty-three thousand, six hundred sixty".