77428270 has 32 divisors (see below), whose sum is σ = 143410176. Its totient is φ = 30084000.

The previous prime is 77428261. The next prime is 77428271. The reversal of 77428270 is 7282477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77428271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70425 + ... + 71515.

It is an arithmetic number, because the mean of its divisors is an integer number (4481568).

Almost surely, 2^77428270 is an apocalyptic number.

77428270 is a deficient number, since it is larger than the sum of its proper divisors (65981906).

77428270 is a wasteful number, since it uses less digits than its factorization.

77428270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 77428270 is about 8799.3334974872. Note that the first 3 decimals coincide. The cubic root of 77428270 is about 426.2193724177.

The spelling of 77428270 in words is "seventy-seven million, four hundred twenty-eight thousand, two hundred seventy".