402290045 has 4 divisors (see below), whose sum is σ = 482748060. Its totient is φ = 321832032.

The previous prime is 402290027. The next prime is 402290089. The reversal of 402290045 is 540092204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79512889 + 322777156 = 8917^2 + 17966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402290045 is a prime.

It is a super-2 number, since 2×402290045² = 323674560612204050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402289996 and 402290023.

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, 40229000 + ... + 40229009.

It is an arithmetic number, because the mean of its divisors is an integer number (120687015).

Almost surely, 2^402290045 is an apocalyptic number.

It is an amenable number.

402290045 is a deficient number, since it is larger than the sum of its proper divisors (80458015).

402290045 is an equidigital number, since it uses as much as digits as its factorization.

402290045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80458014.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 402290045 is about 20057.1694164456. The cubic root of 402290045 is about 738.2097245230.

The spelling of 402290045 in words is "four hundred two million, two hundred ninety thousand, forty-five".