400136770 has 32 divisors (see below), whose sum is σ = 827081280. Its totient is φ = 137845440.

The previous prime is 400136731. The next prime is 400136783. The reversal of 400136770 is 77631004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93637 + ... + 97816.

It is an arithmetic number, because the mean of its divisors is an integer number (25846290).

Almost surely, 2^400136770 is an apocalyptic number.

400136770 is an abundant number, since it is smaller than the sum of its proper divisors (426944510).

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

400136770 is a wasteful number, since it uses less digits than its factorization.

400136770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191490.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 400136770 is about 20003.4189577682. The cubic root of 400136770 is about 736.8902676566.

Adding to 400136770 its reverse (77631004), we get a palindrome (477767774).

The spelling of 400136770 in words is "four hundred million, one hundred thirty-six thousand, seven hundred seventy".