761638 has 4 divisors (see below), whose sum is σ = 1142460. Its totient is φ = 380818.

The previous prime is 761633. The next prime is 761669. The reversal of 761638 is 836167.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836167 = 71 ⋅11777.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190408 + ... + 190411.

It is an arithmetic number, because the mean of its divisors is an integer number (285615).

2⁷⁶¹⁶³⁸ is an apocalyptic number.

761638 is a deficient number, since it is larger than the sum of its proper divisors (380822).

761638 is a wasteful number, since it uses less digits than its factorization.

761638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380821.

The product of its digits is 6048, while the sum is 31.

The square root of 761638 is about 872.7187404886. The cubic root of 761638 is about 91.3235673694.

Subtracting 761638 from its reverse (836167), we obtain a square (74529 = 273²).

The spelling of 761638 in words is "seven hundred sixty-one thousand, six hundred thirty-eight".