406401724 has 12 divisors (see below), whose sum is σ = 712186384. Its totient is φ = 202919904.

The previous prime is 406401719. The next prime is 406401757. The reversal of 406401724 is 427104604.

It is a super-2 number, since 2×406401724² = 330324722540344352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 406401692 and 406401701.

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, 66969 + ... + 72784.

Almost surely, 2^406401724 is an apocalyptic number.

It is an amenable number.

406401724 is a deficient number, since it is larger than the sum of its proper divisors (305784660).

406401724 is a wasteful number, since it uses less digits than its factorization.

406401724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140484 (or 140482 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 406401724 is about 20159.4078286045. The cubic root of 406401724 is about 740.7162070113.

The spelling of 406401724 in words is "four hundred six million, four hundred one thousand, seven hundred twenty-four".