400505630740 has 24 divisors (see below), whose sum is σ = 841421197512. Its totient is φ = 160133800320.

The previous prime is 400505630599. The next prime is 400505630741. The reversal of 400505630740 is 47036505004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49243160464 + 351262470276 = 221908^2 + 592674^2 .

It is a junction number, because it is equal to n+sod(n) for n = 400505630696 and 400505630705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400505630741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4230259 + ... + 4323898.

It is an arithmetic number, because the mean of its divisors is an integer number (35059216563).

Almost surely, 2^400505630740 is an apocalyptic number.

It is an amenable number.

400505630740 is an abundant number, since it is smaller than the sum of its proper divisors (440915566772).

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

400505630740 is a wasteful number, since it uses less digits than its factorization.

400505630740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8556507 (or 8556505 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 400505630740 in words is "four hundred billion, five hundred five million, six hundred thirty thousand, seven hundred forty".