77401340 has 24 divisors (see below), whose sum is σ = 172104912. Its totient is φ = 29139200.

The previous prime is 77401321. The next prime is 77401351. The reversal of 77401340 is 4310477.

77401340 = 419² + 420² + ... + 673².

It is a congruent number.

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, 113486 + ... + 114165.

It is an arithmetic number, because the mean of its divisors is an integer number (7171038).

Almost surely, 2^77401340 is an apocalyptic number.

It is an amenable number.

77401340 is an abundant number, since it is smaller than the sum of its proper divisors (94703572).

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

77401340 is a wasteful number, since it uses less digits than its factorization.

77401340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227677 (or 227675 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77401340 is about 8797.8031348741. The cubic root of 77401340 is about 426.1699528338.

The spelling of 77401340 in words is "seventy-seven million, four hundred one thousand, three hundred forty".