3938681490 has 32 divisors (see below), whose sum is σ = 9456993216. Its totient is φ = 1049853120.

The previous prime is 3938681459. The next prime is 3938681491. The reversal of 3938681490 is 941868393.

It is not an unprimeable number, because it can be changed into a prime (3938681491) 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, 43444 + ... + 98816.

It is an arithmetic number, because the mean of its divisors is an integer number (295531038).

Almost surely, 2^3938681490 is an apocalyptic number.

3938681490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3938681490 is an abundant number, since it is smaller than the sum of its proper divisors (5518311726).

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

3938681490 is a wasteful number, since it uses less digits than its factorization.

3938681490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57754.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 3938681490 is about 62758.9156216071. The cubic root of 3938681490 is about 1579.2478246924.

The spelling of 3938681490 in words is "three billion, nine hundred thirty-eight million, six hundred eighty-one thousand, four hundred ninety".