400673707 has 4 divisors (see below), whose sum is σ = 457912816. Its totient is φ = 343434600.

The previous prime is 400673683. The next prime is 400673711. The reversal of 400673707 is 707376004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400673707 is a prime.

It is a super-2 number, since 2×400673707² = 321078838962243698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400673717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28619544 + ... + 28619557.

It is an arithmetic number, because the mean of its divisors is an integer number (114478204).

Almost surely, 2^400673707 is an apocalyptic number.

400673707 is a deficient number, since it is larger than the sum of its proper divisors (57239109).

400673707 is an equidigital number, since it uses as much as digits as its factorization.

400673707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57239108.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 400673707 is about 20016.8355890735. The cubic root of 400673707 is about 737.2197273421.

The spelling of 400673707 in words is "four hundred million, six hundred seventy-three thousand, seven hundred seven".