139779290 has 32 divisors (see below), whose sum is σ = 288382464. Its totient is φ = 47784960.

The previous prime is 139779281. The next prime is 139779307. The reversal of 139779290 is 92977931.

139779290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22970 + ... + 28410.

It is an arithmetic number, because the mean of its divisors is an integer number (9011952).

Almost surely, 2^139779290 is an apocalyptic number.

139779290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139779290 is an abundant number, since it is smaller than the sum of its proper divisors (148603174).

139779290 is a wasteful number, since it uses less digits than its factorization.

139779290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822.

The product of its (nonzero) digits is 214326, while the sum is 47.

The square root of 139779290 is about 11822.8291876353. The cubic root of 139779290 is about 518.9764011035.

The spelling of 139779290 in words is "one hundred thirty-nine million, seven hundred seventy-nine thousand, two hundred ninety".