9090078438 has 32 divisors (see below), whose sum is σ = 20897438976. Its totient is φ = 2582150688.

The previous prime is 9090078433. The next prime is 9090078443. The reversal of 9090078438 is 8348700909.

It is an interprime number because it is at equal distance from previous prime (9090078433) and next prime (9090078443).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090078433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618256 + ... + 632787.

It is an arithmetic number, because the mean of its divisors is an integer number (653044968).

Almost surely, 2^9090078438 is an apocalyptic number.

9090078438 is an abundant number, since it is smaller than the sum of its proper divisors (11807360538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9090078438 is a wasteful number, since it uses less digits than its factorization.

9090078438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251228.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 9090078438 is about 95341.9028444472. The cubic root of 9090078438 is about 2087.0004542077. Note that the first 3 decimals are identical.

The spelling of 9090078438 in words is "nine billion, ninety million, seventy-eight thousand, four hundred thirty-eight".