402142340 has 48 divisors (see below), whose sum is σ = 865492992. Its totient is φ = 156882816.

The previous prime is 402142339. The next prime is 402142379. The reversal of 402142340 is 43241204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359462 + ... + 360578.

It is an arithmetic number, because the mean of its divisors is an integer number (18031104).

Almost surely, 2^402142340 is an apocalyptic number.

It is an amenable number.

402142340 is an abundant number, since it is smaller than the sum of its proper divisors (463350652).

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

402142340 is a wasteful number, since it uses less digits than its factorization.

402142340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402142340 is about 20053.4869785781. The cubic root of 402142340 is about 738.1193663216.

Adding to 402142340 its reverse (43241204), we get a palindrome (445383544).

The spelling of 402142340 in words is "four hundred two million, one hundred forty-two thousand, three hundred forty".