3958978734 has 64 divisors (see below), whose sum is σ = 9349473600. Its totient is φ = 1237469184.

The previous prime is 3958978733. The next prime is 3958978741. The reversal of 3958978734 is 4378798593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958978733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246502 + ... + 262070.

It is an arithmetic number, because the mean of its divisors is an integer number (146085525).

Almost surely, 2^3958978734 is an apocalyptic number.

3958978734 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3958978734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4674736800).

3958978734 is an abundant number, since it is smaller than the sum of its proper divisors (5390494866).

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

3958978734 is a wasteful number, since it uses less digits than its factorization.

3958978734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15874 (or 15868 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The square root of 3958978734 is about 62920.4158759301. The cubic root of 3958978734 is about 1581.9559622230.

The spelling of 3958978734 in words is "three billion, nine hundred fifty-eight million, nine hundred seventy-eight thousand, seven hundred thirty-four".