77428099 has 8 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 66326856.

The previous prime is 77428073. The next prime is 77428121. The reversal of 77428099 is 99082477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77428099 - 2⁵ = 77428067 is a prime.

It is a super-2 number, since 2×77428099² = 11990221029507602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77428009) 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, 19332 + ... + 22990.

It is an arithmetic number, because the mean of its divisors is an integer number (11067840).

Almost surely, 2^77428099 is an apocalyptic number.

77428099 is a deficient number, since it is larger than the sum of its proper divisors (11114621).

77428099 is a wasteful number, since it uses less digits than its factorization.

77428099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6689.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 77428099 is about 8799.3237808368. The cubic root of 77428099 is about 426.2190586496.

The spelling of 77428099 in words is "seventy-seven million, four hundred twenty-eight thousand, ninety-nine".