90378391 has 8 divisors (see below), whose sum is σ = 92782368. Its totient is φ = 87984000.

The previous prime is 90378371. The next prime is 90378401. The reversal of 90378391 is 19387309.

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 90378391 - 2⁵ = 90378359 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 (90378371) 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, 19246 + ... + 23476.

It is an arithmetic number, because the mean of its divisors is an integer number (11597796).

Almost surely, 2^90378391 is an apocalyptic number.

90378391 is a deficient number, since it is larger than the sum of its proper divisors (2403977).

90378391 is a wasteful number, since it uses less digits than its factorization.

90378391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 90378391 is about 9506.7550194585. The cubic root of 90378391 is about 448.7676421708.

The spelling of 90378391 in words is "ninety million, three hundred seventy-eight thousand, three hundred ninety-one".