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28752938 = 219772977
BaseRepresentation
bin110110110101…
…1110000101010
32000002210121122
41231223300222
524330043223
62504135242
7466252544
oct155536052
960083548
1028752938
1115259565
129767522
135c59496
143b66694
1527ce5c8
hex1b6bc2a

28752938 has 8 divisors (see below), whose sum is σ = 43348932. Its totient is φ = 14303296.

The previous prime is 28752937. The next prime is 28752953. The reversal of 28752938 is 83925782.

It can be written as a sum of positive squares in 2 ways, for example, as 28334329 + 418609 = 5323^2 + 647^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28752937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36095 + ... + 36882.

Almost surely, 228752938 is an apocalyptic number.

28752938 is a deficient number, since it is larger than the sum of its proper divisors (14595994).

28752938 is a wasteful number, since it uses less digits than its factorization.

28752938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73176.

The product of its digits is 241920, while the sum is 44.

The square root of 28752938 is about 5362.1766102955. The cubic root of 28752938 is about 306.3567187147.

The spelling of 28752938 in words is "twenty-eight million, seven hundred fifty-two thousand, nine hundred thirty-eight".

Divisors: 1 2 197 394 72977 145954 14376469 28752938