340778533 has 4 divisors (see below), whose sum is σ = 340953228. Its totient is φ = 340603840.

The previous prime is 340778531. The next prime is 340778551. The reversal of 340778533 is 335877043.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55100929 + 285677604 = 7423^2 + 16902^2 .

It is a cyclic number.

It is not a de Polignac number, because 340778533 - 2¹ = 340778531 is a prime.

It is a super-3 number, since 3×340778533³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340778531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84388 + ... + 88333.

It is an arithmetic number, because the mean of its divisors is an integer number (85238307).

Almost surely, 2^340778533 is an apocalyptic number.

It is an amenable number.

340778533 is a deficient number, since it is larger than the sum of its proper divisors (174695).

340778533 is a wasteful number, since it uses less digits than its factorization.

340778533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174694.

The product of its (nonzero) digits is 211680, while the sum is 40.

The square root of 340778533 is about 18460.1877834436. The cubic root of 340778533 is about 698.4855236958.

The spelling of 340778533 in words is "three hundred forty million, seven hundred seventy-eight thousand, five hundred thirty-three".