1978253354 has 32 divisors (see below), whose sum is σ = 3711730176. Its totient is φ = 768219120.

The previous prime is 1978253351. The next prime is 1978253377. The reversal of 1978253354 is 4533528791.

It is a super-2 number, since 2×1978253354² = 7826972665224498632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1978253299 and 1978253308.

It is not an unprimeable number, because it can be changed into a prime (1978253351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26357 + ... + 68199.

It is an arithmetic number, because the mean of its divisors is an integer number (115991568).

Almost surely, 2^1978253354 is an apocalyptic number.

1978253354 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1978253354 is a deficient number, since it is larger than the sum of its proper divisors (1733476822).

1978253354 is a wasteful number, since it uses less digits than its factorization.

1978253354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42170.

The product of its digits is 907200, while the sum is 47.

The square root of 1978253354 is about 44477.5601174345. The cubic root of 1978253354 is about 1255.3378886295.

The spelling of 1978253354 in words is "one billion, nine hundred seventy-eight million, two hundred fifty-three thousand, three hundred fifty-four".