402249530 has 16 divisors (see below), whose sum is σ = 755529984. Its totient is φ = 153904080.

The previous prime is 402249527. The next prime is 402249559. The reversal of 402249530 is 35942204.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 402249493 and 402249502.

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, 874226 + ... + 874685.

It is an arithmetic number, because the mean of its divisors is an integer number (47220624).

Almost surely, 2^402249530 is an apocalyptic number.

402249530 is a deficient number, since it is larger than the sum of its proper divisors (353280454).

402249530 is a wasteful number, since it uses less digits than its factorization.

402249530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748941.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 402249530 is about 20056.1594030363. The cubic root of 402249530 is about 738.1849417645.

The spelling of 402249530 in words is "four hundred two million, two hundred forty-nine thousand, five hundred thirty".