406628380 has 12 divisors (see below), whose sum is σ = 853919640. Its totient is φ = 162651344.

The previous prime is 406628363. The next prime is 406628429. The reversal of 406628380 is 83826604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10165690 + ... + 10165729.

It is an arithmetic number, because the mean of its divisors is an integer number (71159970).

Almost surely, 2^406628380 is an apocalyptic number.

It is an amenable number.

406628380 is an abundant number, since it is smaller than the sum of its proper divisors (447291260).

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

406628380 is a wasteful number, since it uses less digits than its factorization.

406628380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20331428 (or 20331426 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 406628380 is about 20165.0286387101. The cubic root of 406628380 is about 740.8538840610.

The spelling of 406628380 in words is "four hundred six million, six hundred twenty-eight thousand, three hundred eighty".