401192640 has 84 divisors (see below), whose sum is σ = 1379945424. Its totient is φ = 106983936.

The previous prime is 401192633. The next prime is 401192647. The reversal of 401192640 is 46291104.

401192640 is a `hidden beast` number, since 4 + 0 + 1 + 19 + 2 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (401192633) and next prime (401192647).

It is not an unprimeable number, because it can be changed into a prime (401192647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66772 + ... + 72531.

Almost surely, 2^401192640 is an apocalyptic number.

401192640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401192640 is an abundant number, since it is smaller than the sum of its proper divisors (978752784).

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

401192640 is a wasteful number, since it uses less digits than its factorization.

401192640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139326 (or 139313 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 401192640 is about 20029.7938082248. The cubic root of 401192640 is about 737.5378603565.

The spelling of 401192640 in words is "four hundred one million, one hundred ninety-two thousand, six hundred forty".