67872780 has 36 divisors (see below), whose sum is σ = 205881312. Its totient is φ = 18099360.

The previous prime is 67872767. The next prime is 67872787. The reversal of 67872780 is 8727876.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (67872787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188356 + ... + 188715.

Almost surely, 2^67872780 is an apocalyptic number.

67872780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67872780 is an abundant number, since it is smaller than the sum of its proper divisors (138008532).

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

67872780 is a wasteful number, since it uses less digits than its factorization.

67872780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377086 (or 377081 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 67872780 is about 8238.4937943777. The cubic root of 67872780 is about 407.9108080697.

The spelling of 67872780 in words is "sixty-seven million, eight hundred seventy-two thousand, seven hundred eighty".