1971454340 has 24 divisors (see below), whose sum is σ = 4149677952. Its totient is φ = 786748640.

The previous prime is 1971454337. The next prime is 1971454363. The reversal of 1971454340 is 434541791.

It is a junction number, because it is equal to n+sod(n) for n = 1971454294 and 1971454303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105734 + ... + 122973.

It is an arithmetic number, because the mean of its divisors is an integer number (172903248).

Almost surely, 2^1971454340 is an apocalyptic number.

1971454340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971454340 is an abundant number, since it is smaller than the sum of its proper divisors (2178223612).

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

1971454340 is a wasteful number, since it uses less digits than its factorization.

1971454340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229147 (or 229145 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 1971454340 is about 44401.0623746775. The cubic root of 1971454340 is about 1253.8980904764.

The spelling of 1971454340 in words is "one billion, nine hundred seventy-one million, four hundred fifty-four thousand, three hundred forty".