90858838 has 24 divisors (see below), whose sum is σ = 159075144. Its totient is φ = 38808000.

The previous prime is 90858787. The next prime is 90858839. The reversal of 90858838 is 83885809.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 90858791 and 90858800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90858839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31038 + ... + 33838.

It is an arithmetic number, because the mean of its divisors is an integer number (6628131).

Almost surely, 2^90858838 is an apocalyptic number.

90858838 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

90858838 is a deficient number, since it is larger than the sum of its proper divisors (68216306).

90858838 is a wasteful number, since it uses less digits than its factorization.

90858838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148 (or 3141 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 49.

The square root of 90858838 is about 9531.9902433857. The cubic root of 90858838 is about 449.5614459907.

The spelling of 90858838 in words is "ninety million, eight hundred fifty-eight thousand, eight hundred thirty-eight".