4907979638 has 4 divisors (see below), whose sum is σ = 7361969460. Its totient is φ = 2453989818.

The previous prime is 4907979631. The next prime is 4907979641. The reversal of 4907979638 is 8369797094.

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

It is a super-2 number, since 2×4907979638² = 48176528254045222088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4907979631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1226994908 + ... + 1226994911.

It is an arithmetic number, because the mean of its divisors is an integer number (1840492365).

Almost surely, 2^4907979638 is an apocalyptic number.

4907979638 is a deficient number, since it is larger than the sum of its proper divisors (2453989822).

4907979638 is a wasteful number, since it uses less digits than its factorization.

4907979638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453989821.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The square root of 4907979638 is about 70056.9742281238. The cubic root of 4907979638 is about 1699.4207528264.

The spelling of 4907979638 in words is "four billion, nine hundred seven million, nine hundred seventy-nine thousand, six hundred thirty-eight".