407421540 has 72 divisors (see below), whose sum is σ = 1289590848. Its totient is φ = 103920960.

The previous prime is 407421451. The next prime is 407421571. The reversal of 407421540 is 45124704.

407421540 is a `hidden beast` number, since 407 + 4 + 215 + 40 = 666.

It is a super-2 number, since 2×407421540² = 331984622511943200, which contains 22 as substring.

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, 45066 + ... + 53345.

It is an arithmetic number, because the mean of its divisors is an integer number (17910984).

Almost surely, 2^407421540 is an apocalyptic number.

It is an amenable number.

407421540 is an abundant number, since it is smaller than the sum of its proper divisors (882169308).

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

407421540 is a wasteful number, since it uses less digits than its factorization.

407421540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98449 (or 98444 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 407421540 is about 20184.6857790752. The cubic root of 407421540 is about 741.3352687404.

The spelling of 407421540 in words is "four hundred seven million, four hundred twenty-one thousand, five hundred forty".