3898705731 has 8 divisors (see below), whose sum is σ = 5365960704. Its totient is φ = 2515293960.

The previous prime is 3898705721. The next prime is 3898705757. The reversal of 3898705731 is 1375078983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3898705731 - 2¹⁵ = 3898672963 is a prime.

It is a super-2 number, since 2×3898705731² = 30399812753864488722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3898705711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20960691 + ... + 20960876.

It is an arithmetic number, because the mean of its divisors is an integer number (670745088).

Almost surely, 2^3898705731 is an apocalyptic number.

3898705731 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3898705731 is a deficient number, since it is larger than the sum of its proper divisors (1467254973).

3898705731 is a wasteful number, since it uses less digits than its factorization.

3898705731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41921601.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 3898705731 is about 62439.6166788362. The cubic root of 3898705731 is about 1573.8867727294.

The spelling of 3898705731 in words is "three billion, eight hundred ninety-eight million, seven hundred five thousand, seven hundred thirty-one".