1958336978 has 16 divisors (see below), whose sum is σ = 3301010496. Its totient is φ = 864549840.

The previous prime is 1958336971. The next prime is 1958336983. The reversal of 1958336978 is 8796338591.

It is not an unprimeable number, because it can be changed into a prime (1958336971) 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, 1636808 + ... + 1638003.

It is an arithmetic number, because the mean of its divisors is an integer number (206313156).

Almost surely, 2^1958336978 is an apocalyptic number.

1958336978 is a deficient number, since it is larger than the sum of its proper divisors (1342673518).

1958336978 is a wasteful number, since it uses less digits than its factorization.

1958336978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3274849.

The product of its digits is 9797760, while the sum is 59.

The square root of 1958336978 is about 44253.1013376464. The cubic root of 1958336978 is about 1251.1109010666.

The spelling of 1958336978 in words is "one billion, nine hundred fifty-eight million, three hundred thirty-six thousand, nine hundred seventy-eight".