139497030 has 96 divisors (see below), whose sum is σ = 376238304. Its totient is φ = 35831808.

The previous prime is 139497023. The next prime is 139497091. The reversal of 139497030 is 30794931.

139497030 is a `hidden beast` number, since 139 + 497 + 0 + 30 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 542662 + ... + 542918.

It is an arithmetic number, because the mean of its divisors is an integer number (3919149).

Almost surely, 2^139497030 is an apocalyptic number.

139497030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 139497030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188119152).

139497030 is an abundant number, since it is smaller than the sum of its proper divisors (236741274).

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

139497030 is a wasteful number, since it uses less digits than its factorization.

139497030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 139497030 is about 11810.8860802228. The cubic root of 139497030 is about 518.6268381343.

The spelling of 139497030 in words is "one hundred thirty-nine million, four hundred ninety-seven thousand, thirty".