3478831021 has 8 divisors (see below), whose sum is σ = 3599735040. Its totient is φ = 3359745312.

The previous prime is 3478831009. The next prime is 3478831033. The reversal of 3478831021 is 1201388743.

It is an interprime number because it is at equal distance from previous prime (3478831009) and next prime (3478831033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3478831021 - 2³¹ = 1331347373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3478831621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450685 + ... + 458338.

It is an arithmetic number, because the mean of its divisors is an integer number (449966880).

Almost surely, 2^3478831021 is an apocalyptic number.

It is an amenable number.

3478831021 is a deficient number, since it is larger than the sum of its proper divisors (120904019).

3478831021 is an equidigital number, since it uses as much as digits as its factorization.

3478831021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909155.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 3478831021 is about 58981.6159578559. The cubic root of 3478831021 is about 1515.2272705625.

The spelling of 3478831021 in words is "three billion, four hundred seventy-eight million, eight hundred thirty-one thousand, twenty-one".