400019745400 has 48 divisors (see below), whose sum is σ = 1014595541640. Its totient is φ = 145461724800.

The previous prime is 400019745383. The next prime is 400019745401. The reversal of 400019745400 is 4547910004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400019745401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90911379 + ... + 90915778.

Almost surely, 2^400019745400 is an apocalyptic number.

400019745400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400019745400 is an abundant number, since it is smaller than the sum of its proper divisors (614575796240).

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

400019745400 is a wasteful number, since it uses less digits than its factorization.

400019745400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181827184 (or 181827175 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 400019745400 in words is "four hundred billion, nineteen million, seven hundred forty-five thousand, four hundred".