400222988 has 18 divisors (see below), whose sum is σ = 769851348. Its totient is φ = 181919320.

The previous prime is 400222967. The next prime is 400223009. The reversal of 400222988 is 889222004.

It is an interprime number because it is at equal distance from previous prime (400222967) and next prime (400223009).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412970 + ... + 413937.

Almost surely, 2^400222988 is an apocalyptic number.

It is an amenable number.

400222988 is a deficient number, since it is larger than the sum of its proper divisors (369628360).

400222988 is a wasteful number, since it uses less digits than its factorization.

400222988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826933 (or 826920 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 400222988 is about 20005.5739232845. The cubic root of 400222988 is about 736.9431900964.

The spelling of 400222988 in words is "four hundred million, two hundred twenty-two thousand, nine hundred eighty-eight".