72003778 has 16 divisors (see below), whose sum is σ = 134656704. Its totient is φ = 28053360.

The previous prime is 72003773. The next prime is 72003797. The reversal of 72003778 is 87730027.

It is not an unprimeable number, because it can be changed into a prime (72003773) 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, 233625 + ... + 233932.

It is an arithmetic number, because the mean of its divisors is an integer number (8416044).

Almost surely, 2^72003778 is an apocalyptic number.

72003778 is a deficient number, since it is larger than the sum of its proper divisors (62652926).

72003778 is a wasteful number, since it uses less digits than its factorization.

72003778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467577.

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 72003778 is about 8485.5039921032. The cubic root of 72003778 is about 416.0240409245.

The spelling of 72003778 in words is "seventy-two million, three thousand, seven hundred seventy-eight".