28978037 has 8 divisors (see below), whose sum is σ = 31719072. Its totient is φ = 26254800.

The previous prime is 28978003. The next prime is 28978073. The reversal of 28978037 is 73087982.

It is a happy number.

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

It is not a de Polignac number, because 28978037 - 2¹² = 28973941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978637) 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, 914 + ... + 7667.

It is an arithmetic number, because the mean of its divisors is an integer number (3964884).

Almost surely, 2^28978037 is an apocalyptic number.

It is an amenable number.

28978037 is a deficient number, since it is larger than the sum of its proper divisors (2741035).

28978037 is a wasteful number, since it uses less digits than its factorization.

28978037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8899.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 28978037 is about 5383.1252075351. The cubic root of 28978037 is about 307.1541028719.

The spelling of 28978037 in words is "twenty-eight million, nine hundred seventy-eight thousand, thirty-seven".