400425554 has 4 divisors (see below), whose sum is σ = 600638334. Its totient is φ = 200212776.

The previous prime is 400425541. The next prime is 400425563. The reversal of 400425554 is 455524004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388681225 + 11744329 = 19715^2 + 3427^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106387 + ... + 100106390.

Almost surely, 2^400425554 is an apocalyptic number.

400425554 is a deficient number, since it is larger than the sum of its proper divisors (200212780).

400425554 is a wasteful number, since it uses less digits than its factorization.

400425554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200212779.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 400425554 is about 20010.6360218760. The cubic root of 400425554 is about 737.0674995112.

Adding to 400425554 its reverse (455524004), we get a palindrome (855949558).

The spelling of 400425554 in words is "four hundred million, four hundred twenty-five thousand, five hundred fifty-four".