405044742 has 16 divisors (see below), whose sum is σ = 811852272. Its totient is φ = 134721120.

The previous prime is 405044713. The next prime is 405044753. The reversal of 405044742 is 247440504.

It is a super-2 number, since 2×405044742² = 328122486043693128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70453 + ... + 75984.

It is an arithmetic number, because the mean of its divisors is an integer number (50740767).

Almost surely, 2^405044742 is an apocalyptic number.

405044742 is an abundant number, since it is smaller than the sum of its proper divisors (406807530).

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

405044742 is a wasteful number, since it uses less digits than its factorization.

405044742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146903.

The product of its (nonzero) digits is 17920, while the sum is 30.

The square root of 405044742 is about 20125.7233907256. The cubic root of 405044742 is about 739.8908665454.

The spelling of 405044742 in words is "four hundred five million, forty-four thousand, seven hundred forty-two".