400100394940 has 24 divisors (see below), whose sum is σ = 840339439632. Its totient is φ = 160015660800.

The previous prime is 400100394929. The next prime is 400100394961. The reversal of 400100394940 is 49493001004.

It is a super-2 number, since 2×400100394940² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400100394896 and 400100394905.

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, 1396861 + ... + 1658740.

It is an arithmetic number, because the mean of its divisors is an integer number (35014143318).

Almost surely, 2^400100394940 is an apocalyptic number.

It is an amenable number.

400100394940 is an abundant number, since it is smaller than the sum of its proper divisors (440239044692).

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

400100394940 is a wasteful number, since it uses less digits than its factorization.

400100394940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3062157 (or 3062155 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

Adding to 400100394940 its reverse (49493001004), we get a palindrome (449593395944).

The spelling of 400100394940 in words is "four hundred billion, one hundred million, three hundred ninety-four thousand, nine hundred forty".