400953986 has 16 divisors (see below), whose sum is σ = 632530944. Its totient is φ = 190247904.

The previous prime is 400953983. The next prime is 400953997. The reversal of 400953986 is 689359004.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400953983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28475 + ... + 40158.

It is an arithmetic number, because the mean of its divisors is an integer number (39533184).

Almost surely, 2^400953986 is an apocalyptic number.

400953986 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

400953986 is a deficient number, since it is larger than the sum of its proper divisors (231576958).

400953986 is a wasteful number, since it uses less digits than its factorization.

400953986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68785.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 400953986 is about 20023.8354467869. The cubic root of 400953986 is about 737.3915870900.

The spelling of 400953986 in words is "four hundred million, nine hundred fifty-three thousand, nine hundred eighty-six".