78077830 has 8 divisors (see below), whose sum is σ = 140540112. Its totient is φ = 31231128.

The previous prime is 78077819. The next prime is 78077837. The reversal of 78077830 is 3877087.

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

It is a super-2 number, since 2×78077830² = 12192295075017800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78077837) 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, 3903882 + ... + 3903901.

It is an arithmetic number, because the mean of its divisors is an integer number (17567514).

Almost surely, 2^78077830 is an apocalyptic number.

78077830 is a deficient number, since it is larger than the sum of its proper divisors (62462282).

78077830 is a wasteful number, since it uses less digits than its factorization.

78077830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7807790.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 78077830 is about 8836.1660237911. The cubic root of 78077830 is about 427.4079324779.

The spelling of 78077830 in words is "seventy-eight million, seventy-seven thousand, eight hundred thirty".