82388770 has 8 divisors (see below), whose sum is σ = 148299804. Its totient is φ = 32955504.

The previous prime is 82388759. The next prime is 82388777. The reversal of 82388770 is 7788328.

It can be written as a sum of positive squares in 2 ways, for example, as 76440049 + 5948721 = 8743^2 + 2439^2 .

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

It is a super-2 number, since 2×82388770² = 13575818844225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82388777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4119429 + ... + 4119448.

Almost surely, 2^82388770 is an apocalyptic number.

82388770 is a deficient number, since it is larger than the sum of its proper divisors (65911034).

82388770 is a wasteful number, since it uses less digits than its factorization.

82388770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238884.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 82388770 is about 9076.8259870948. The cubic root of 82388770 is about 435.1336533864.

The spelling of 82388770 in words is "eighty-two million, three hundred eighty-eight thousand, seven hundred seventy".