3756638 has 4 divisors (see below), whose sum is σ = 5634960. Its totient is φ = 1878318.

The previous prime is 3756637. The next prime is 3756667. The reversal of 3756638 is 8366573.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×3756638² = 28224658126088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3756637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939158 + ... + 939161.

It is an arithmetic number, because the mean of its divisors is an integer number (1408740).

Almost surely, 2^3756638 is an apocalyptic number.

3756638 is a deficient number, since it is larger than the sum of its proper divisors (1878322).

3756638 is a wasteful number, since it uses less digits than its factorization.

3756638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878321.

The product of its digits is 90720, while the sum is 38.

The square root of 3756638 is about 1938.2048395358. The cubic root of 3756638 is about 155.4532415252.

The spelling of 3756638 in words is "three million, seven hundred fifty-six thousand, six hundred thirty-eight".