38551140 has 120 divisors (see below), whose sum is σ = 123492600. Its totient is φ = 10063872.

The previous prime is 38551129. The next prime is 38551141. The reversal of 38551140 is 4115583.

It can be written as a sum of positive squares in 4 ways, for example, as 8608356 + 29942784 = 2934^2 + 5472^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38551141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85636 + ... + 86084.

It is an arithmetic number, because the mean of its divisors is an integer number (1029105).

Almost surely, 2^38551140 is an apocalyptic number.

38551140 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 38551140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61746300).

38551140 is an abundant number, since it is smaller than the sum of its proper divisors (84941460).

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

38551140 is a wasteful number, since it uses less digits than its factorization.

38551140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 38551140 is about 6208.9564340556. The cubic root of 38551140 is about 337.8151131047.

The spelling of 38551140 in words is "thirty-eight million, five hundred fifty-one thousand, one hundred forty".