405274731 has 8 divisors (see below), whose sum is σ = 568806720. Its totient is φ = 255962952.

The previous prime is 405274657. The next prime is 405274733. The reversal of 405274731 is 137472504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405274731 - 2¹³ = 405266539 is a prime.

It is a super-2 number, since 2×405274731² = 328495215174244722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 405274692 and 405274701.

It is not an unprimeable number, because it can be changed into a prime (405274733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3554985 + ... + 3555098.

It is an arithmetic number, because the mean of its divisors is an integer number (71100840).

Almost surely, 2^405274731 is an apocalyptic number.

405274731 is a deficient number, since it is larger than the sum of its proper divisors (163531989).

405274731 is a wasteful number, since it uses less digits than its factorization.

405274731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7110105.

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 405274731 is about 20131.4363869049. The cubic root of 405274731 is about 740.0308795247.

The spelling of 405274731 in words is "four hundred five million, two hundred seventy-four thousand, seven hundred thirty-one".