77270460 has 24 divisors (see below), whose sum is σ = 216357456. Its totient is φ = 20605440.

The previous prime is 77270443. The next prime is 77270461. The reversal of 77270460 is 6407277.

It is a happy number.

It is a super-2 number, since 2×77270460² = 11941447977223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77270461) 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, 643861 + ... + 643980.

It is an arithmetic number, because the mean of its divisors is an integer number (9014894).

Almost surely, 2^77270460 is an apocalyptic number.

It is an amenable number.

77270460 is an abundant number, since it is smaller than the sum of its proper divisors (139086996).

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

77270460 is a wasteful number, since it uses less digits than its factorization.

77270460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287853 (or 1287851 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 77270460 is about 8790.3617672995. The cubic root of 77270460 is about 425.9296099175.

The spelling of 77270460 in words is "seventy-seven million, two hundred seventy thousand, four hundred sixty".