67904778 has 16 divisors (see below), whose sum is σ = 135920160. Its totient is φ = 22616496.

The previous prime is 67904761. The next prime is 67904779. The reversal of 67904778 is 87740976.

It is a super-2 number, since 2×67904778² = 9222117750458568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67904779) 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, 4876 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (8495010).

Almost surely, 2^67904778 is an apocalyptic number.

67904778 is an abundant number, since it is smaller than the sum of its proper divisors (68015382).

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

67904778 is a wasteful number, since it uses less digits than its factorization.

67904778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221.

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 67904778 is about 8240.4355467414. The cubic root of 67904778 is about 407.9748999361.

The spelling of 67904778 in words is "sixty-seven million, nine hundred four thousand, seven hundred seventy-eight".