400039797 has 8 divisors (see below), whose sum is σ = 535676544. Its totient is φ = 265548128.

The previous prime is 400039789. The next prime is 400039807. The reversal of 400039797 is 797930004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400039797 - 2³ = 400039789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400039777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285453 + ... + 286850.

It is an arithmetic number, because the mean of its divisors is an integer number (66959568).

Almost surely, 2^400039797 is an apocalyptic number.

It is an amenable number.

400039797 is a deficient number, since it is larger than the sum of its proper divisors (135636747).

400039797 is a wasteful number, since it uses less digits than its factorization.

400039797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572539.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 400039797 is about 20000.9949002543. The cubic root of 400039797 is about 736.8307344847.

The spelling of 400039797 in words is "four hundred million, thirty-nine thousand, seven hundred ninety-seven".