402240032 has 48 divisors (see below), whose sum is σ = 836619840. Its totient is φ = 189842688.

The previous prime is 402240023. The next prime is 402240037. The reversal of 402240032 is 230042204.

It is a super-2 number, since 2×402240032² = 323594086686722048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402240037) 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, 191693 + ... + 193779.

It is an arithmetic number, because the mean of its divisors is an integer number (17429580).

Almost surely, 2^402240032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402240032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418309920).

402240032 is an abundant number, since it is smaller than the sum of its proper divisors (434379808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402240032 is a wasteful number, since it uses less digits than its factorization.

402240032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2425 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 402240032 is about 20055.9226165240. The cubic root of 402240032 is about 738.1791316598.

Adding to 402240032 its reverse (230042204), we get a palindrome (632282236).

The spelling of 402240032 in words is "four hundred two million, two hundred forty thousand, thirty-two".