400242646 has 8 divisors (see below), whose sum is σ = 600456384. Its totient is φ = 200090520.

The previous prime is 400242617. The next prime is 400242707. The reversal of 400242646 is 646242004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7876 + ... + 29368.

It is an arithmetic number, because the mean of its divisors is an integer number (75057048).

Almost surely, 2^400242646 is an apocalyptic number.

400242646 is a deficient number, since it is larger than the sum of its proper divisors (200213738).

400242646 is a wasteful number, since it uses less digits than its factorization.

400242646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30806.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 400242646 is about 20006.0652303245. The cubic root of 400242646 is about 736.9552555304.

The spelling of 400242646 in words is "four hundred million, two hundred forty-two thousand, six hundred forty-six".