401187616 has 24 divisors (see below), whose sum is σ = 815318784. Its totient is φ = 194122560.

The previous prime is 401187599. The next prime is 401187617. The reversal of 401187616 is 616781104.

It is not an unprimeable number, because it can be changed into a prime (401187617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201220 + ... + 203203.

It is an arithmetic number, because the mean of its divisors is an integer number (33971616).

Almost surely, 2^401187616 is an apocalyptic number.

It is an amenable number.

401187616 is an abundant number, since it is smaller than the sum of its proper divisors (414131168).

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

401187616 is a wasteful number, since it uses less digits than its factorization.

401187616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404464 (or 404456 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 401187616 is about 20029.6683946590. The cubic root of 401187616 is about 737.5347816977.

The spelling of 401187616 in words is "four hundred one million, one hundred eighty-seven thousand, six hundred sixteen".