401487642 has 12 divisors (see below), whose sum is σ = 869889930. Its totient is φ = 133829208.

The previous prime is 401487641. The next prime is 401487649. The reversal of 401487642 is 246784104.

401487642 is a `hidden beast` number, since 4 + 0 + 1 + 4 + 8 + 7 + 642 = 666.

It can be written as a sum of positive squares in only one way, i.e., 393585921 + 7901721 = 19839^2 + 2811^2 .

It is a super-2 number, since 2×401487642² = 322384653357440328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401487597 and 401487606.

It is not an unprimeable number, because it can be changed into a prime (401487641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11152417 + ... + 11152452.

Almost surely, 2^401487642 is an apocalyptic number.

401487642 is an abundant number, since it is smaller than the sum of its proper divisors (468402288).

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

401487642 is a wasteful number, since it uses less digits than its factorization.

401487642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22304877 (or 22304874 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 401487642 is about 20037.1565347980. The cubic root of 401487642 is about 737.7185896914.

The spelling of 401487642 in words is "four hundred one million, four hundred eighty-seven thousand, six hundred forty-two".