400921630 has 8 divisors (see below), whose sum is σ = 721658952. Its totient is φ = 160368648.

The previous prime is 400921589. The next prime is 400921649. The reversal of 400921630 is 36129004.

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

It is a super-3 number, since 3×400921630³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400921595 and 400921604.

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, 20046072 + ... + 20046091.

It is an arithmetic number, because the mean of its divisors is an integer number (90207369).

Almost surely, 2^400921630 is an apocalyptic number.

400921630 is a deficient number, since it is larger than the sum of its proper divisors (320737322).

400921630 is a wasteful number, since it uses less digits than its factorization.

400921630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40092170.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 400921630 is about 20023.0274933637. The cubic root of 400921630 is about 737.3717513276.

The spelling of 400921630 in words is "four hundred million, nine hundred twenty-one thousand, six hundred thirty".