400465340 has 48 divisors (see below), whose sum is σ = 921884544. Its totient is φ = 144916800.

The previous prime is 400465313. The next prime is 400465349. The reversal of 400465340 is 43564004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400465349) 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, 42107 + ... + 50733.

It is an arithmetic number, because the mean of its divisors is an integer number (19205928).

Almost surely, 2^400465340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400465340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (460942272).

400465340 is an abundant number, since it is smaller than the sum of its proper divisors (521419204).

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

400465340 is a wasteful number, since it uses less digits than its factorization.

400465340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8858 (or 8856 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 400465340 is about 20011.6301185086. The cubic root of 400465340 is about 737.0919102046.

The spelling of 400465340 in words is "four hundred million, four hundred sixty-five thousand, three hundred forty".