90278149 has 8 divisors (see below), whose sum is σ = 97297760. Its totient is φ = 83269296.

The previous prime is 90278099. The next prime is 90278171. The reversal of 90278149 is 94187209.

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 90278149 - 2⁹ = 90277637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90278549) 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, 26734 + ... + 29920.

It is an arithmetic number, because the mean of its divisors is an integer number (12162220).

Almost surely, 2^90278149 is an apocalyptic number.

It is an amenable number.

90278149 is a deficient number, since it is larger than the sum of its proper divisors (7019611).

90278149 is a wasteful number, since it uses less digits than its factorization.

90278149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 90278149 is about 9501.4814108117. The cubic root of 90278149 is about 448.6016658889.

The spelling of 90278149 in words is "ninety million, two hundred seventy-eight thousand, one hundred forty-nine".