402680445 has 16 divisors (see below), whose sum is σ = 682188480. Its totient is φ = 202129664.

The previous prime is 402680437. The next prime is 402680449. The reversal of 402680445 is 544086204.

It is a cyclic number.

It is not a de Polignac number, because 402680445 - 2³ = 402680437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402680449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 789315 + ... + 789824.

It is an arithmetic number, because the mean of its divisors is an integer number (42636780).

Almost surely, 2^402680445 is an apocalyptic number.

It is an amenable number.

402680445 is a deficient number, since it is larger than the sum of its proper divisors (279508035).

402680445 is a wasteful number, since it uses less digits than its factorization.

402680445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579164.

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 402680445 is about 20066.8992373012. The cubic root of 402680445 is about 738.4484444084.

The spelling of 402680445 in words is "four hundred two million, six hundred eighty thousand, four hundred forty-five".