400044460440 has 32 divisors (see below), whose sum is σ = 1200133381680. Its totient is φ = 106678522752.

The previous prime is 400044460427. The next prime is 400044460463. The reversal of 400044460440 is 44064440004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 400044460398 and 400044460407.

It is a congruent number.

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, 1666851799 + ... + 1666852038.

Almost surely, 2^400044460440 is an apocalyptic number.

400044460440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400044460440 is an abundant number, since it is smaller than the sum of its proper divisors (800088921240).

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

400044460440 is a wasteful number, since it uses less digits than its factorization.

400044460440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333703851 (or 3333703847 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

The spelling of 400044460440 in words is "four hundred billion, forty-four million, four hundred sixty thousand, four hundred forty".