38220140 has 24 divisors (see below), whose sum is σ = 91728672. Its totient is φ = 13104000.

The previous prime is 38220113. The next prime is 38220151. The reversal of 38220140 is 4102283.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136361 + ... + 136640.

It is an arithmetic number, because the mean of its divisors is an integer number (3822028).

Almost surely, 2^38220140 is an apocalyptic number.

It is an amenable number.

38220140 is an abundant number, since it is smaller than the sum of its proper divisors (53508532).

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

38220140 is a wasteful number, since it uses less digits than its factorization.

38220140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273017 (or 273015 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 38220140 is about 6182.2439291895. The cubic root of 38220140 is about 336.8455061763.

The spelling of 38220140 in words is "thirty-eight million, two hundred twenty thousand, one hundred forty".