400622725 has 6 divisors (see below), whose sum is σ = 496772210. Its totient is φ = 320498160.

The previous prime is 400622713. The next prime is 400622737. The reversal of 400622725 is 527226004.

It is an interprime number because it is at equal distance from previous prime (400622713) and next prime (400622737).

It can be written as a sum of positive squares in 3 ways, for example, as 141348321 + 259274404 = 11889^2 + 16102^2 .

It is not a de Polignac number, because 400622725 - 2⁵ = 400622693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400622693 and 400622702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8012430 + ... + 8012479.

Almost surely, 2^400622725 is an apocalyptic number.

It is an amenable number.

400622725 is a deficient number, since it is larger than the sum of its proper divisors (96149485).

400622725 is a wasteful number, since it uses less digits than its factorization.

400622725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16024919 (or 16024914 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 400622725 is about 20015.5620705490. The cubic root of 400622725 is about 737.1884578996.

Adding to 400622725 its reverse (527226004), we get a palindrome (927848729).

The spelling of 400622725 in words is "four hundred million, six hundred twenty-two thousand, seven hundred twenty-five".