400972948 has 24 divisors (see below), whose sum is σ = 761106024. Its totient is φ = 184089600.

The previous prime is 400972939. The next prime is 400972967. The reversal of 400972948 is 849279004.

It can be written as a sum of positive squares in 4 ways, for example, as 13749264 + 387223684 = 3708^2 + 19678^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69123 + ... + 74698.

It is an arithmetic number, because the mean of its divisors is an integer number (31712751).

Almost surely, 2^400972948 is an apocalyptic number.

It is an amenable number.

400972948 is a deficient number, since it is larger than the sum of its proper divisors (360133076).

400972948 is a wasteful number, since it uses less digits than its factorization.

400972948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143883 (or 143881 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 400972948 is about 20024.3089269018. The cubic root of 400972948 is about 737.4032111993.

The spelling of 400972948 in words is "four hundred million, nine hundred seventy-two thousand, nine hundred forty-eight".