67900770 has 144 divisors (see below), whose sum is σ = 208873080. Its totient is φ = 15257088.

The previous prime is 67900769. The next prime is 67900823. The reversal of 67900770 is 7700976.

67900770 = 49² + 50² + ... + 588².

It can be written as a sum of positive squares in 4 ways, for example, as 58110129 + 9790641 = 7623^2 + 3129^2 .

It is a super-2 number, since 2×67900770² = 9221029133185800, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 392404 + ... + 392576.

Almost surely, 2^67900770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67900770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104436540).

67900770 is an abundant number, since it is smaller than the sum of its proper divisors (140972310).

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

67900770 is a wasteful number, since it uses less digits than its factorization.

67900770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 67900770 is about 8240.1923521238. The cubic root of 67900770 is about 407.9668730313.

The spelling of 67900770 in words is "sixty-seven million, nine hundred thousand, seven hundred seventy".