7643402 has 16 divisors (see below), whose sum is σ = 12436200. Its totient is φ = 3502272.

The previous prime is 7643399. The next prime is 7643411. The reversal of 7643402 is 2043467.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2531281 + 5112121 = 1591^2 + 2261^2 .

It is a super-4 number, since 4×7643402⁴ (a number of 29 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 2888 + ... + 4860.

Almost surely, 2^7643402 is an apocalyptic number.

7643402 is a deficient number, since it is larger than the sum of its proper divisors (4792798).

7643402 is a wasteful number, since it uses less digits than its factorization.

7643402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 7643402 is about 2764.6703239265. The cubic root of 7643402 is about 196.9830694822.

Adding to 7643402 its reverse (2043467), we get a palindrome (9686869).

The spelling of 7643402 in words is "seven million, six hundred forty-three thousand, four hundred two".