40605780 has 24 divisors (see below), whose sum is σ = 113696352. Its totient is φ = 10828192.

The previous prime is 40605779. The next prime is 40605797. The reversal of 40605780 is 8750604.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338322 + ... + 338441.

It is an arithmetic number, because the mean of its divisors is an integer number (4737348).

Almost surely, 2^40605780 is an apocalyptic number.

It is an amenable number.

40605780 is an abundant number, since it is smaller than the sum of its proper divisors (73090572).

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

40605780 is a wasteful number, since it uses less digits than its factorization.

40605780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676775 (or 676773 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 40605780 is about 6372.2664727709. The cubic root of 40605780 is about 343.7129952452.

The spelling of 40605780 in words is "forty million, six hundred five thousand, seven hundred eighty".