38139534 has 48 divisors (see below), whose sum is σ = 88350912. Its totient is φ = 11848704.

The previous prime is 38139509. The next prime is 38139559. The reversal of 38139534 is 43593183.

38139534 = 27² + 28² + ... + 485².

It is an interprime number because it is at equal distance from previous prime (38139509) and next prime (38139559).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34027 + ... + 35129.

It is an arithmetic number, because the mean of its divisors is an integer number (1840644).

Almost surely, 2^38139534 is an apocalyptic number.

38139534 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38139534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44175456).

38139534 is an abundant number, since it is smaller than the sum of its proper divisors (50211378).

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

38139534 is a wasteful number, since it uses less digits than its factorization.

38139534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1238 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 38139534 is about 6175.7213343868. The cubic root of 38139534 is about 336.6085379278.

The spelling of 38139534 in words is "thirty-eight million, one hundred thirty-nine thousand, five hundred thirty-four".