400945340 has 24 divisors (see below), whose sum is σ = 891514512. Its totient is φ = 150944000.

The previous prime is 400945339. The next prime is 400945343. The reversal of 400945340 is 43549004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400945343) 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, 589286 + ... + 589965.

It is an arithmetic number, because the mean of its divisors is an integer number (37146438).

Almost surely, 2^400945340 is an apocalyptic number.

It is an amenable number.

400945340 is an abundant number, since it is smaller than the sum of its proper divisors (490569172).

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

400945340 is a wasteful number, since it uses less digits than its factorization.

400945340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179277 (or 1179275 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 400945340 is about 20023.6195529180. The cubic root of 400945340 is about 737.3862867864.

The spelling of 400945340 in words is "four hundred million, nine hundred forty-five thousand, three hundred forty".