400290667 has 16 divisors (see below), whose sum is σ = 469453824. Its totient is φ = 334152000.

The previous prime is 400290647. The next prime is 400290677. The reversal of 400290667 is 766092004.

It is not a de Polignac number, because 400290667 - 2¹⁹ = 399766379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400290647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260692 + ... + 262222.

It is an arithmetic number, because the mean of its divisors is an integer number (29340864).

Almost surely, 2^400290667 is an apocalyptic number.

400290667 is a deficient number, since it is larger than the sum of its proper divisors (69163157).

400290667 is a wasteful number, since it uses less digits than its factorization.

400290667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 400290667 is about 20007.2653553653. The cubic root of 400290667 is about 736.9847275797.

The spelling of 400290667 in words is "four hundred million, two hundred ninety thousand, six hundred sixty-seven".