77243642 has 16 divisors (see below), whose sum is σ = 135997440. Its totient is φ = 32209488.

The previous prime is 77243627. The next prime is 77243657. The reversal of 77243642 is 24634277.

It is an interprime number because it is at equal distance from previous prime (77243627) and next prime (77243657).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74042 + ... + 75077.

It is an arithmetic number, because the mean of its divisors is an integer number (8499840).

Almost surely, 2^77243642 is an apocalyptic number.

77243642 is a deficient number, since it is larger than the sum of its proper divisors (58753798).

77243642 is a wasteful number, since it uses less digits than its factorization.

77243642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149165.

The product of its digits is 56448, while the sum is 35.

The square root of 77243642 is about 8788.8362141981. The cubic root of 77243642 is about 425.8803288943.

The spelling of 77243642 in words is "seventy-seven million, two hundred forty-three thousand, six hundred forty-two".