400667740 has 48 divisors (see below), whose sum is σ = 919628640. Its totient is φ = 145422080.

The previous prime is 400667737. The next prime is 400667749. The reversal of 400667740 is 47766004.

It is a junction number, because it is equal to n+sod(n) for n = 400667696 and 400667705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400667749) 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, 142266 + ... + 145054.

It is an arithmetic number, because the mean of its divisors is an integer number (19158930).

Almost surely, 2^400667740 is an apocalyptic number.

It is an amenable number.

400667740 is an abundant number, since it is smaller than the sum of its proper divisors (518960900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400667740 is a wasteful number, since it uses less digits than its factorization.

400667740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462 (or 3460 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 400667740 is about 20016.6865389854. The cubic root of 400667740 is about 737.2160676627.

The spelling of 400667740 in words is "four hundred million, six hundred sixty-seven thousand, seven hundred forty".