7828157 has 2 divisors, whose sum is σ = 7828158. Its totient is φ = 7828156.

The previous prime is 7828147. The next prime is 7828187. The reversal of 7828157 is 7518287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6205081 + 1623076 = 2491^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 7828157 - 2⁴ = 7828141 is a prime.

It is a super-2 number, since 2×7828157² = 122560084033298, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7828157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7828147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3914078 + 3914079.

It is an arithmetic number, because the mean of its divisors is an integer number (3914079).

Almost surely, 2^7828157 is an apocalyptic number.

It is an amenable number.

7828157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7828157 is an equidigital number, since it uses as much as digits as its factorization.

7828157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31360, while the sum is 38.

The square root of 7828157 is about 2797.8843793123. The cubic root of 7828157 is about 198.5575973814.

It can be divided in two parts, 782815 and 7, that multiplied together give a triangular number (5479705 = T₃₃₁₀).

The spelling of 7828157 in words is "seven million, eight hundred twenty-eight thousand, one hundred fifty-seven".