40400770 has 16 divisors (see below), whose sum is σ = 75229560. Its totient is φ = 15602944.

The previous prime is 40400747. The next prime is 40400771. The reversal of 40400770 is 7700404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 38081241 + 2319529 = 6171^2 + 1523^2 .

It is not an unprimeable number, because it can be changed into a prime (40400771) 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, 69367 + ... + 69946.

Almost surely, 2^40400770 is an apocalyptic number.

40400770 is a deficient number, since it is larger than the sum of its proper divisors (34828790).

40400770 is a wasteful number, since it uses less digits than its factorization.

40400770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139349.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 40400770 is about 6356.1600042793. The cubic root of 40400770 is about 343.1335742707.

The spelling of 40400770 in words is "forty million, four hundred thousand, seven hundred seventy".