38220240 has 80 divisors (see below), whose sum is σ = 119331648. Its totient is φ = 10119168.

The previous prime is 38220211. The next prime is 38220251. The reversal of 38220240 is 4202283.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38632 + ... + 39608.

Almost surely, 2^38220240 is an apocalyptic number.

38220240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59665824).

38220240 is an abundant number, since it is smaller than the sum of its proper divisors (81111408).

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

38220240 is a wasteful number, since it uses less digits than its factorization.

38220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 38220240 is about 6182.2520168625. The cubic root of 38220240 is about 336.8457999526.

The spelling of 38220240 in words is "thirty-eight million, two hundred twenty thousand, two hundred forty".