40478634 has 48 divisors (see below), whose sum is σ = 101155392. Its totient is φ = 11458944.

The previous prime is 40478621. The next prime is 40478651. The reversal of 40478634 is 43687404.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12817 + ... + 15659.

It is an arithmetic number, because the mean of its divisors is an integer number (2107404).

Almost surely, 2^40478634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40478634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50577696).

40478634 is an abundant number, since it is smaller than the sum of its proper divisors (60676758).

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

40478634 is a wasteful number, since it uses less digits than its factorization.

40478634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 40478634 is about 6362.2821377239. The cubic root of 40478634 is about 343.3538721074.

The spelling of 40478634 in words is "forty million, four hundred seventy-eight thousand, six hundred thirty-four".