398841157 has 8 divisors (see below), whose sum is σ = 468568800. Its totient is φ = 334691760.

The previous prime is 398841143. The next prime is 398841169. The reversal of 398841157 is 751148893.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-398841157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398841187) 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, 1394407 + ... + 1394692.

It is an arithmetic number, because the mean of its divisors is an integer number (58571100).

Almost surely, 2^398841157 is an apocalyptic number.

It is an amenable number.

398841157 is a deficient number, since it is larger than the sum of its proper divisors (69727643).

398841157 is a wasteful number, since it uses less digits than its factorization.

398841157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789123.

The product of its digits is 241920, while the sum is 46.

The square root of 398841157 is about 19971.0079114701. The cubic root of 398841157 is about 736.0940758025.

It can be divided in two parts, 39884 and 1157, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 398841157 in words is "three hundred ninety-eight million, eight hundred forty-one thousand, one hundred fifty-seven".