78743630 has 32 divisors (see below), whose sum is σ = 163670976. Its totient is φ = 26717184.

The previous prime is 78743629. The next prime is 78743633. The reversal of 78743630 is 3634787.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78743633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 992 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (5114718).

Almost surely, 2^78743630 is an apocalyptic number.

78743630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78743630 is an abundant number, since it is smaller than the sum of its proper divisors (84927346).

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

78743630 is a wasteful number, since it uses less digits than its factorization.

78743630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11708.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 78743630 is about 8873.7607585510. The cubic root of 78743630 is about 428.6193866438.

The spelling of 78743630 in words is "seventy-eight million, seven hundred forty-three thousand, six hundred thirty".