290156340 has 48 divisors (see below), whose sum is σ = 860231232. Its totient is φ = 72823296.

The previous prime is 290156309. The next prime is 290156351. The reversal of 290156340 is 43651092.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 290156298 and 290156307.

It is a congruent number.

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, 141214 + ... + 143253.

It is an arithmetic number, because the mean of its divisors is an integer number (17921484).

Almost surely, 2^290156340 is an apocalyptic number.

290156340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

290156340 is an abundant number, since it is smaller than the sum of its proper divisors (570074892).

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

290156340 is a wasteful number, since it uses less digits than its factorization.

290156340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284496 (or 284494 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 290156340 is about 17033.9760478874. The cubic root of 290156340 is about 662.0295195290.

The spelling of 290156340 in words is "two hundred ninety million, one hundred fifty-six thousand, three hundred forty".