340579890 has 120 divisors (see below), whose sum is σ = 1065420972. Its totient is φ = 77837760.

The previous prime is 340579873. The next prime is 340579891. The reversal of 340579890 is 98975043.

It can be written as a sum of positive squares in 2 ways, for example, as 274531761 + 66048129 = 16569^2 + 8127^2 .

It is a super-2 number, since 2×340579890² = 231989322944824200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (340579891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 35400 + ... + 43980.

Almost surely, 2^340579890 is an apocalyptic number.

340579890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 340579890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532710486).

340579890 is an abundant number, since it is smaller than the sum of its proper divisors (724841082).

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

340579890 is a wasteful number, since it uses less digits than its factorization.

340579890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8614 (or 8598 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 340579890 is about 18454.8066909410. The cubic root of 340579890 is about 698.3497793980.

The spelling of 340579890 in words is "three hundred forty million, five hundred seventy-nine thousand, eight hundred ninety".