28990077 has 8 divisors (see below), whose sum is σ = 39143040. Its totient is φ = 19081920.

The previous prime is 28990061. The next prime is 28990133. The reversal of 28990077 is 77009982.

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

It is not a de Polignac number, because 28990077 - 2⁴ = 28990061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28990057) 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, 60924 + ... + 61397.

It is an arithmetic number, because the mean of its divisors is an integer number (4892880).

Almost surely, 2^28990077 is an apocalyptic number.

It is an amenable number.

28990077 is a deficient number, since it is larger than the sum of its proper divisors (10152963).

28990077 is a wasteful number, since it uses less digits than its factorization.

28990077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122403.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 28990077 is about 5384.2434008874. The cubic root of 28990077 is about 307.1966365022.

The spelling of 28990077 in words is "twenty-eight million, nine hundred ninety thousand, seventy-seven".