40642770 has 64 divisors (see below), whose sum is σ = 112619520. Its totient is φ = 9194688.

The previous prime is 40642769. The next prime is 40642781. The reversal of 40642770 is 7724604.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20691 + ... + 22569.

It is an arithmetic number, because the mean of its divisors is an integer number (1759680).

Almost surely, 2^40642770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40642770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56309760).

40642770 is an abundant number, since it is smaller than the sum of its proper divisors (71976750).

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

40642770 is a wasteful number, since it uses less digits than its factorization.

40642770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 40642770 is about 6375.1682330743. The cubic root of 40642770 is about 343.8173324852.

The spelling of 40642770 in words is "forty million, six hundred forty-two thousand, seven hundred seventy".