400487966 has 8 divisors (see below), whose sum is σ = 632349480. Its totient is φ = 189704808.

The previous prime is 400487957. The next prime is 400487993. The reversal of 400487966 is 669784004.

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

It is a super-2 number, since 2×400487966² = 320781221821634312, which contains 22 as substring.

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, 5269541 + ... + 5269616.

It is an arithmetic number, because the mean of its divisors is an integer number (79043685).

Almost surely, 2^400487966 is an apocalyptic number.

400487966 is a deficient number, since it is larger than the sum of its proper divisors (231861514).

400487966 is a wasteful number, since it uses less digits than its factorization.

400487966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539178.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 400487966 is about 20012.1954317861. The cubic root of 400487966 is about 737.1057916619.

The spelling of 400487966 in words is "four hundred million, four hundred eighty-seven thousand, nine hundred sixty-six".