77740372 has 6 divisors (see below), whose sum is σ = 136045658. Its totient is φ = 38870184.

The previous prime is 77740361. The next prime is 77740393. The reversal of 77740372 is 27304777.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 24245776 = 7314^2 + 4924^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9717543 + ... + 9717550.

Almost surely, 2^77740372 is an apocalyptic number.

It is an amenable number.

77740372 is a deficient number, since it is larger than the sum of its proper divisors (58305286).

77740372 is a wasteful number, since it uses less digits than its factorization.

77740372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19435097 (or 19435095 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 37.

The square root of 77740372 is about 8817.0500735790. The cubic root of 77740372 is about 426.7912806043.

The spelling of 77740372 in words is "seventy-seven million, seven hundred forty thousand, three hundred seventy-two".