400458642 has 8 divisors (see below), whose sum is σ = 800917296. Its totient is φ = 133486212.

The previous prime is 400458599. The next prime is 400458661. The reversal of 400458642 is 246854004.

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

400458642 is an admirable 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, 33371548 + ... + 33371559.

It is an arithmetic number, because the mean of its divisors is an integer number (100114662).

Almost surely, 2^400458642 is an apocalyptic number.

400458642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

400458642 is a wasteful number, since it uses less digits than its factorization.

400458642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66743112.

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 400458642 is about 20011.4627651254. The cubic root of 400458642 is about 737.0878007611.

The spelling of 400458642 in words is "four hundred million, four hundred fifty-eight thousand, six hundred forty-two".