400848040 has 32 divisors (see below), whose sum is σ = 905440680. Its totient is φ = 159711232.

The previous prime is 400848029. The next prime is 400848053. The reversal of 400848040 is 40848004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 375506884 + 25341156 = 19378^2 + 5034^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9217 + ... + 29776.

Almost surely, 2^400848040 is an apocalyptic number.

400848040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400848040 is an abundant number, since it is smaller than the sum of its proper divisors (504592640).

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

400848040 is a wasteful number, since it uses less digits than its factorization.

400848040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39261 (or 39257 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 400848040 is about 20021.1897748361. The cubic root of 400848040 is about 737.3266331935.

The spelling of 400848040 in words is "four hundred million, eight hundred forty-eight thousand, forty".