400402647 has 12 divisors (see below), whose sum is σ = 578750640. Its totient is φ = 266754528.

The previous prime is 400402633. The next prime is 400402657. The reversal of 400402647 is 746204004.

It is not a de Polignac number, because 400402647 - 2⁴ = 400402631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400402647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400402657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 238 + ... + 28299.

It is an arithmetic number, because the mean of its divisors is an integer number (48229220).

Almost surely, 2^400402647 is an apocalyptic number.

400402647 is a deficient number, since it is larger than the sum of its proper divisors (178347993).

400402647 is a wasteful number, since it uses less digits than its factorization.

400402647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30102 (or 30099 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 400402647 is about 20010.0636430772. The cubic root of 400402647 is about 737.0534441918.

The spelling of 400402647 in words is "four hundred million, four hundred two thousand, six hundred forty-seven".