1954973538 has 48 divisors (see below), whose sum is σ = 4843365696. Its totient is φ = 558277920.

The previous prime is 1954973483. The next prime is 1954973539. The reversal of 1954973538 is 8353794591.

1954973538 is a `hidden beast` number, since 1 + 95 + 497 + 35 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (1954973539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433845 + ... + 438327.

It is an arithmetic number, because the mean of its divisors is an integer number (100903452).

Almost surely, 2^1954973538 is an apocalyptic number.

1954973538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1954973538 is an abundant number, since it is smaller than the sum of its proper divisors (2888392158).

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

1954973538 is a wasteful number, since it uses less digits than its factorization.

1954973538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7959 (or 7956 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The square root of 1954973538 is about 44215.0826981020. The cubic root of 1954973538 is about 1250.3942304262.

The spelling of 1954973538 in words is "one billion, nine hundred fifty-four million, nine hundred seventy-three thousand, five hundred thirty-eight".