406605540 has 48 divisors (see below), whose sum is σ = 1241997120. Its totient is φ = 98570880.

The previous prime is 406605509. The next prime is 406605587. The reversal of 406605540 is 45506604.

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

It is a junction number, because it is equal to n+sod(n) for n = 406605498 and 406605507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307375 + ... + 308694.

It is an arithmetic number, because the mean of its divisors is an integer number (25874940).

Almost surely, 2^406605540 is an apocalyptic number.

It is an amenable number.

406605540 is an abundant number, since it is smaller than the sum of its proper divisors (835391580).

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

406605540 is a wasteful number, since it uses less digits than its factorization.

406605540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616092 (or 616090 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 406605540 is about 20164.4623037660. The cubic root of 406605540 is about 740.8400127391.

The spelling of 406605540 in words is "four hundred six million, six hundred five thousand, five hundred forty".