3498654978 has 384 divisors, whose sum is σ = 10700605440. Its totient is φ = 836075520.

The previous prime is 3498654953. The next prime is 3498654989. The reversal of 3498654978 is 8794568943.

3498654978 is a `hidden beast` number, since 3 + 4 + 9 + 86 + 549 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 18127650 + ... + 18127842.

It is an arithmetic number, because the mean of its divisors is an integer number (27866160).

Almost surely, 2^3498654978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3498654978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5350302720).

3498654978 is an abundant number, since it is smaller than the sum of its proper divisors (7201950462).

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

3498654978 is a wasteful number, since it uses less digits than its factorization.

3498654978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 266 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 3498654978 is about 59149.4292280154. The cubic root of 3498654978 is about 1518.0999715441.

The spelling of 3498654978 in words is "three billion, four hundred ninety-eight million, six hundred fifty-four thousand, nine hundred seventy-eight".