77407742 has 16 divisors (see below), whose sum is σ = 121347072. Its totient is φ = 36963960.

The previous prime is 77407741. The next prime is 77407753. The reversal of 77407742 is 24770477.

It is a junction number, because it is equal to n+sod(n) for n = 77407696 and 77407705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77407741) 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, 55943 + ... + 57309.

It is an arithmetic number, because the mean of its divisors is an integer number (7584192).

Almost surely, 2^77407742 is an apocalyptic number.

77407742 is a deficient number, since it is larger than the sum of its proper divisors (43939330).

77407742 is a wasteful number, since it uses less digits than its factorization.

77407742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623.

The product of its (nonzero) digits is 76832, while the sum is 38.

The square root of 77407742 is about 8798.1669681815. The cubic root of 77407742 is about 426.1817022635.

The spelling of 77407742 in words is "seventy-seven million, four hundred seven thousand, seven hundred forty-two".