402345400 has 48 divisors (see below), whose sum is σ = 960753240. Its totient is φ = 156585600.

The previous prime is 402345379. The next prime is 402345401. The reversal of 402345400 is 4543204.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402345401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19786 + ... + 34585.

Almost surely, 2^402345400 is an apocalyptic number.

402345400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402345400 is an abundant number, since it is smaller than the sum of its proper divisors (558407840).

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

402345400 is a wasteful number, since it uses less digits than its factorization.

402345400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54424 (or 54415 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 402345400 is about 20058.5492994882. The cubic root of 402345400 is about 738.2435821221.

Adding to 402345400 its reverse (4543204), we get a palindrome (406888604).

The spelling of 402345400 in words is "four hundred two million, three hundred forty-five thousand, four hundred".