402042744 has 32 divisors (see below), whose sum is σ = 1116786000. Its totient is φ = 134014176.

The previous prime is 402042743. The next prime is 402042749. The reversal of 402042744 is 447240204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402042743) 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, 930439 + ... + 930870.

Almost surely, 2^402042744 is an apocalyptic number.

It is an amenable number.

402042744 is an abundant number, since it is smaller than the sum of its proper divisors (714743256).

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

402042744 is a wasteful number, since it uses less digits than its factorization.

402042744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861324 (or 1861314 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The square root of 402042744 is about 20051.0035659066. The cubic root of 402042744 is about 738.0584262026.

Adding to 402042744 its reverse (447240204), we get a palindrome (849282948).

It can be divided in two parts, 4020 and 42744, that added together give a palindrome (46764).

The spelling of 402042744 in words is "four hundred two million, forty-two thousand, seven hundred forty-four".