77389406 has 16 divisors (see below), whose sum is σ = 124006464. Its totient is φ = 36094464.

The previous prime is 77389399. The next prime is 77389409. The reversal of 77389406 is 60498377.

It is a super-2 number, since 2×77389406² = 11978240322065672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77389409) 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, 6230 + ... + 13913.

It is an arithmetic number, because the mean of its divisors is an integer number (7750404).

Almost surely, 2^77389406 is an apocalyptic number.

77389406 is a deficient number, since it is larger than the sum of its proper divisors (46617058).

77389406 is a wasteful number, since it uses less digits than its factorization.

77389406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20275.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 77389406 is about 8797.1248712292. The cubic root of 77389406 is about 426.1480489338.

The spelling of 77389406 in words is "seventy-seven million, three hundred eighty-nine thousand, four hundred six".