40400670 has 64 divisors (see below), whose sum is σ = 105489216. Its totient is φ = 9861120.

The previous prime is 40400603. The next prime is 40400713. The reversal of 40400670 is 7600404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17800 + ... + 19940.

It is an arithmetic number, because the mean of its divisors is an integer number (1648269).

Almost surely, 2^40400670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40400670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52744608).

40400670 is an abundant number, since it is smaller than the sum of its proper divisors (65088546).

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

40400670 is a wasteful number, since it uses less digits than its factorization.

40400670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 40400670 is about 6356.1521378897. The cubic root of 40400670 is about 343.1332911623.

The spelling of 40400670 in words is "forty million, four hundred thousand, six hundred seventy".