402403749 has 32 divisors (see below), whose sum is σ = 605713920. Its totient is φ = 235483200.

The previous prime is 402403741. The next prime is 402403751. The reversal of 402403749 is 947304204.

It is not a de Polignac number, because 402403749 - 2³ = 402403741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402403741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168534 + ... + 170904.

It is an arithmetic number, because the mean of its divisors is an integer number (18928560).

Almost surely, 2^402403749 is an apocalyptic number.

It is an amenable number.

402403749 is a deficient number, since it is larger than the sum of its proper divisors (203310171).

402403749 is a wasteful number, since it uses less digits than its factorization.

402403749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 402403749 is about 20060.0037138581. The cubic root of 402403749 is about 738.2792676240.

The spelling of 402403749 in words is "four hundred two million, four hundred three thousand, seven hundred forty-nine".